User Manual

18. Window Expansion
Press the H3 menu selection button and choose Zoom. As a result, the window area defined by two cursors
will be expanded to the full screen size (see Fig. 28).
Fig. 28 Zoom Window
19. How to set the Trigger System
Trigger determines when Oscilloscope starts to acquire data and waveform display. Once trigger to be set
correctly then it will convert the unstable display to meaning waveform.
When Oscilloscope start to acquire data it will acquire enough data to form waveform on left of trigger point.
Oscilloscope continues to acquire data when it waits for trigger condition happen. Once it detect out the trigger
it will acquire enough data continuously to form the waveform on right of trigger point.
Trigger control area consists of 1 knob and 3 menu keys.
TRIG LEVEL: The knob that set the trigger level; press the knob and the level will be cleaned to Zero.
50%: The instant execute button setting the trigger level to the vertical midpoint between the
peaks of the trigger signal.
Force: Force to create a trigger signal and the function is mainly used in “Normal” and “Single”
mode.
Trigger Menu: The button that activates the trigger control menu.
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